Crystal for Dummies
Crystal for Dummies
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27Local economists have appeared into their crystal balls and witnessed a thing relatively unpleasant.当地的经济学者们已预测到将会出现棘手的问题。《柯林斯英汉双解大词典》
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人造水晶分为熔炼水晶与养殖晶：据水晶专家汪毅的阐述，随着水晶的价值提高，喜欢的人增多，水晶也引起了作伪者的兴趣，现阶段中国水晶市场常见的造假方法为：
水碧：《山海经》中，水晶又被称作水碧： �?又南三百里，日耿山，无草木，多水碧 �?，郭璞注�?�?亦水玉类 ”。这种称谓常被文人所引用，晋代郭景纯《璞江赋》道�?�?鬼，水碧�?�?。水晶又有人称它叫玉瑛。《符瑞图》载�?美石似玉，水精谓之玉瑛也�?”
C2 [ U ] transparent glass of quite superior quality, ordinarily with its surface Reduce into fragile styles:
结晶�?When sea water is permitted to evaporate, salt crystals are deposited. 海水蒸发后，盐的结晶体就沉淀下来。
⑩、雷射内雕：以计算机辅助激光设备在水晶对象中进行三维图案的成型，艺术效果好，可以任意表达各类图案，图形，达到逼真效果
损伤是指水晶由于加工或不小心摔掉、碰撞等原因，人为造成的损坏。它可以是破口，也可以是凹坑等。
Crystals in many cases are seen as a thing of enormous splendor, and so they are generally employed with diamonds or other stones to produce pieces of jewelry. Many crystals now are person-manufactured in laboratories.
22Working from what The us now appreciates about by itself, the bureau's professionals as well as other demographers supply an irresistible, if clouded, crystal ball among their visions.
16I opened the box and saw a bit of crystal snowflake in addition to a greeting card with "Delighted Birthday" inside the blank paper.我打开盒子并看见在白纸中有一片水晶雪花和一张写着“生日快乐”的贺卡。
You will find just a few distinct device-mobile designs, so many more info alternative crystals share an individual device-mobile type. A significant attribute of the unit mobile is the quantity of atoms it contains. The overall number of atoms in the whole crystal is definitely the amount in Every single mobile multiplied by the volume of unit cells. Copper and aluminum (Al) Each and every have one particular atom for every device cell, although zinc (Zn) and sodium chloride have two. Most crystals have just a few atoms for every device mobile, but there are many exceptions. Crystals of polymers, by way of example, have 1000s of atoms in each unit cell.
Crystals are categorised normally categories, for example insulators, metals, semiconductors, and molecular solids. Only one crystal of the insulator is frequently transparent and resembles a piece of glass. Metals are shiny Unless of course they may have rusted. Semiconductors are sometimes shiny and at times transparent but are never ever rusty. Quite a few crystals is often categorized as one kind of solid, while some have intermediate behaviour. Cadmium sulfide (CdS) is usually geared up in pure sort and is a superb insulator; when impurities are included to cadmium sulfide, it becomes a fascinating semiconductor.
21You all know how after you take a crystal prism and go a beam of sunlight through it, you can get a spectrum, which looks like a steady band of rainbow shades.